The latest offering in LPCI’s Conservation Strategies Series gives private landowners an overview of the hows and whys of mesquite removal as a core conservation practice that benefits both ranch operations and prairie wildlife.
You can download the Mesquite Removal Conservation Strategies Series fact sheet (PDF), or read the story below:
Conservation Strategies Series: Mesquite Removal
When mesquite overtakes grasslands, both livestock and prairie wildlife lose out. Removing mesquite increases forage production and improves habitat for lesser prairie-chickens and other grassland-dependent species.
For ranchers in Texas and New Mexico, honey mesquite encroachment can pose a real problem. Mesquite outcompetes desireable grasses and forbs. If a ranch’s stocking rates remain the same as mesquite cover increases, overgrazing can result, reducing the grassland’s health and resiliency.
While honey mesquite is a natural part of the prairie ecosystem in this region, its density has increased since the late nineteenth century due to suppression of natural fires and spreading of mesquite seed by domestic livestock. Depending on the site and climate, honey mesquite can grow to 25 feet in height with main stems as large as 2 feet in diameter.
The prairies of North America evolved under the tag-team disturbances of bison grazing and fire. Bison herds grazed infrequently but intensely. Areas that went ungrazed built up dry fuels that supported wildfires that kept mesquite shrubs in check. Historic cattle ranching brought continuous and often heavy grazing that reduced the grass fuel load needed to carry wildfires.
Benefits of Mesquite Management
- Increased grassland acreage and productivity, meaning more forage for cattle and more grassland habitat for wildlife.
- Increased nutrients and water available for grasses and forbs.
- Increased grassland health, which provides more resiliency and options for producers when drought hits.
- Increased surface water flow and groundwater recharge for springs.
Killing the plants. Chemical treatment of mesquite can effectively kill mesquite, if done under the right conditions. While hand spraying has the greatest accuracy, it’s very expensive, so aerial spraying is a commonly used option.
Removing the skeletons. Killing the mesquite plant isn’t enough. The mesquite plants continue to occupy potential grassland space, limiting forage production for livestock. What’s more, studies show that prairie chickens avoid mesquite shrubs whether or not they have leaf cover. The above-ground structure of mesquite can be removed by grubbing (digging the root system up with an excavator) or mowing.
Preventing re-encroachment. Prescribed fire is the least expensive of the treatment methods—a cost-effective way to prevent reencroachment. Fire suppresses young mesquite seedlings and limits the number of seed-bearing plants. Older mesquite plants will resprout following fire.
Rancher Spotlight: Bret Riley, New Mexico
In his Own Words: “The one thing my grandpa used to tell me over and over is that if you take care of your country it’ll take care of you. I think that’s where it starts.”
“The most practical way to control mesquite is by spraying it by aircraft, and that’s what we’ve started doing. Mesquite is hard to kill, and the timing of it is critical. We’ve had one pasture we’ve been planning on spraying for the last three years, and we haven’t got it sprayed yet just because the climatic conditions haven’t been right.”
“In areas that have been treated—the next year even—the grass back in there will be unbelievable because of the amount of moisture that is available, especially in an ecosystem like this where we’re short [on water].”
To learn more about LPCI assistance, contact your local NRCS office.
The Lesser Prairie-Chicken Initiative, led by the USDA’s Natural Resources Conservation Service, is a partnership-based, science-driven effort that uses voluntary incentives to proactively conserve America’s western rangelands, wildlife, and rural way of life.